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Re: Help...1972 350 W/HEI
Just as an fyi: When checking timing, plug or cap the vacuum port on the carb that goes to the vacuum advance. I'm sure you already know this but I've seen some do it wrong.
Re. ported vacuum or manifold vacuum. After you check the timing you can hook it up either way to see where it runs better. Manifold vacuum is below the throttle butterflies on the carb and ported vacuum is above them.
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68 GMC 250/3 speed Saginaw p/b p/s
69 Chevy 350/350 currently in pieces still lookin for a cab
06 Trailblazer
I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...
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